Final Answer
$-5+a+a^2+a^4$
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Step-by-step Solution
Specify the solving method
1
Apply the formula: $order\left(x,a,b\right)$$=order\left(x,a,b\right)$, where $b=2$ and $x=a^4-5+a^2+a$
$-5+a+a^2+a^4$
Final Answer
$-5+a+a^2+a^4$